/* Copyright (c) 2007 HomeAway, Inc.
 *  All rights reserved.  http://www.atomserver.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.atomserver.utils.locale;

import java.util.Locale;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author Chris Berry  (chriswberry at gmail.com)
 * @author Bryon Jacob (bryon at jacob.net)
 */
public class LocaleUtils {
       
    static private Log log = LogFactory.getLog(LocaleUtils.class);

    static {
        loadValidLocales();
    }

    static void loadValidLocales() {
        if ( log.isDebugEnabled() )
            log.debug( "LocaleUtils:: localeSet= " +
                       (Set<Locale>) org.apache.commons.lang.LocaleUtils.availableLocaleSet());
    }

    public static Locale toLocale( String str ) {
        Locale locale = org.apache.commons.lang.LocaleUtils.toLocale( str );
        if ( ! org.apache.commons.lang.LocaleUtils.isAvailableLocale( locale ) ) 
            return null;

        // We do NOT allow variants
        if ( ! locale.getVariant().equals( "" ) ) 
            return null;

        return locale;
    }
}